What is CAZ (clean-air zone)?
A clean-air zone (CAZ) is a mandate that has come into effect in some UK cities. These charge drivers of older and more polluting cars a fee to enter city centres, to encourage the switch to cleaner vehicles.
See a list of all UK Clean Air Zones, find out if you're allowed to drive in them and how much it'll cost you
Related glossary terms
NEDC - new European driving cycleNEDC (new European driving cycle) is an older testing standard used to measure a car's fuel economy (mpg) and emissions.ULEZ - ultra low emissions zoneULEZ (ultra-low emissions zone) is an area that includes most of Greater London, which sees a daily charge applied to older petrol and diesel cars driving within the zone.WLTP - worldwide harmonised light vehicle test procedureWLTP (worldwide harmonised light vehicle test procedure) is a testing standard used to measure fuel economy and emissions.